relative humidity

noun

: the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature

Examples of relative humidity in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Wind gusts could reach 35 mph, and relative humidity could be as low as 8-12%. Michelle Cruz, AZCentral.com, 31 July 2025 Those seeds are dried down to a certain relative humidity and then frozen at -20 degrees Celsius, which is close to the temperature of a typical home freezer. Karen Kucher, San Diego Union-Tribune, 10 July 2025 From Saturday, June 21, to Monday, June 23, the heat index — a combination of atmospheric temperatures and relative humidity that determines how the heat really feels to the body — peaked at over 100 degrees each day. Lily Carey, Chicago Tribune, 29 June 2025 Meteorologists identified southwest winds of 15 to 25 mph with gusts up to 40 mph, combined with relative humidity as low as 7-12 percent, as primary drivers of the fire risk. Hannah Parry, MSNBC Newsweek, 24 June 2025 See All Example Sentences for relative humidity

Word History

First Known Use

1819, in the meaning defined above

Time Traveler
The first known use of relative humidity was in 1819

Browse Nearby Words

Cite this Entry

“Relative humidity.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/relative%20humidity. Accessed 4 Aug. 2025.

Kids Definition

relative humidity

noun
: the amount of water vapor actually present in the air compared to the greatest amount possible at the same temperature

Medical Definition

relative humidity

noun
: the ratio of the amount of water vapor actually present in the air to the greatest amount possible at the same temperature compare absolute humidity

More from Merriam-Webster on relative humidity

Last Updated: - Updated example sentences
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